The reporter failed to properly investigate his claims, or conduct any sort of due diligence.
This is how alot of these posers are caught- they just can't help themselves with their outlandish claims. Had this guy claimed he was a support guy with no combat time, no one would have given him a second glance.
There was a case on LF a few years ago similar to this, a PFC claiming to be an SF sniper, posing with a Browning A-Bolt and 3x9 scope for his hometown newspaper. Much hilarity ensued when the story was forwarded to his Chain of Command.